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Exam2pass > EMC > EMC Certifications > E20-526 > E20-526 Online Practice Questions and Answers

E20-526 Online Practice Questions and Answers

Questions 4

A customer wants to purchase an XtremIO array. After the array is installed, the customer wants to initially disable encryption. What is the result of enabling encryption on an array that is already being used?

A. Data will remain in place but the XtremIO cluster services will need to be temporarily shutdown.

B. Data will remain in place and there will be no interruption to the XtremIO cluster services.

C. Data will be erased but there will be no interruption to the XtremIO cluster services.

D. Data will be erased and the XtremIO cluster services will be temporarily shutdown.

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Correct Answer: A

Disable Encryption and Non-Encrypted Models This version [Ver. 4.0.2-65] allows disabling the Data at Rest Encryption (DARE), if desired. Disabling and Enabling is done when the cluster is stopped.

References: https://samshouseblog.com/2015/12/29/new-features-and-changes-in-xtremio-ver-4-0-2-65/

Questions 5

An XtremIO administrator is having a problem with performance and is troubleshooting the issue. What is an accurate statement about I/O transfers?

A. As I/O size increases, IOPs increase, and latency increases

B. As I/O size increases, IOPs decrease, and bandwidth increases

C. As I/O size decreases, IOPs increase, and bandwidth increases

D. As I/O size decreases, IOPs decrease, and latency increases

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Correct Answer: A

Large block I/O by nature incurs higher latency.

References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 6

Questions 6

Which level of granularity does XtremIO deduplication run?

A. Variable 8 kB

B. Variable 32 kB

C. Fixed 8 kB

D. Fixed 32 kB

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Correct Answer: C

EMC XtremIO(All-Flash) : SAN, inline deduplication, 8K fixed chunk size;

References: https://www.linkedin.com/pulse/deduplication-fake-reality-mike-uzan

Questions 7

Which operation is performed when an XtremIO Snapshot is created?

A. Pointers to the ancestor metadata are created for the snapshot

B. Space equal to the size of the ancestor is allocated to the snapshot

C. A reserved space is created for new snapshot data

D. A deduplication pass is immediately run against the snapshot

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Correct Answer: A

When a snap is created, the following steps occur: 1) Two empty containers are created in-memory 2) Snapshot SCSI personality is pointing to the new snapshot sub-node 3) The SCSI personality which the host is using, is linked to the second node in the internal data tree

References: EMC RECOVERPOINT REPLICATION OF XTREMIO, Understanding the essentials of RecoverPoint Snap-based replication for XtremIO, page 8 https://www.emc.com/collateral/white-papers/ h14296-wp-recoverpoint-replication-of-xtremio.pdf

Questions 8

A customer has a VMware vSphere environment running Native Multipathing (NMP). Which path selection policy should be set for optimal performance when connected to an XtremIO cluster?

A. Fixed AP

B. Most Recently Used

C. Fixed

D. Round Robin

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Correct Answer: D

Configuring vSphere Native Multipathing.

For best performance, it is recommended to do the following:

Set the native round robin path selection policy on XtremIO volumes presented to the ESX host.

References: https://itzikr.wordpress.com/2015/12/16/host-configuration-for-vmware-vsphere-on-emcxtremio/

Questions 9

What is a characteristic of the XtremIO Snapshot feature?

A. Snapshots may be deleted in any order

B. Snapshots can only be deleted in reverse creation order

C. Only one snapshot may be created or deleted at a time

D. Snapshots can be restored

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Correct Answer: D

Any copy in the hierarchy tree can be deleted without effecting the parents or children.

Incorrect Answers: B: Deleting a snapshot in the middle of the tree triggers an asynchronous process. This process merges the metadata of the deleted entity's children with that of their grandparents. This ensures that the tree structure is not fragmented.

C: It is possible to create copies of the production volumes in order to protect against logical data corruption. Multiple copies can be created over a short interval in order to provide a fine RecoverPoint Objective (RPO) in a cyclic manner (a superior RPO to a backup).

References: https://www.emc.com/collateral/white-paper/h13035-wp-introduction-to-xtremiosnapshots.pdf, page 14

Questions 10

What is the maximum speed of the Fibre Channel ports on an XtremIO storage controller?

A. 2 Gb/s

B. 4 Gb/s

C. 8 Gb/s

D. 16 Gb/s

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Correct Answer: C

Each Storage Controller includes two 8Gb/s Fibre Channel (FC) ports.

References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 8

Questions 11

You have conducted a meeting with a company's Chief Technology Officer (CTO). The CTO wants an XtremIO solution to meet their business needs. The CTO wants you to review the proposed solution with their desktop administrator to identify any additional requirements.

What are two key considerations to discuss with the desktop administrator?

A. Rapid desktop deployment and operational ease of use

B. Application response time and rapid boot times

C. Sufficient capacity and performance

D. Ease of management and ability to customize end-user desktops

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Correct Answer: BC

Questions 12

When creating XtremIO volumes for a host, which operating systems will benefit by changing the default logical block size for applications consisting of 4 KB I/Os?

A. Microsoft Windows and RHEL

B. VMware ESX and Microsoft Windows

C. RHEL and IBM AIX

D. Sun Solaris and HP-UX

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Correct Answer: B

With VMware ESX 5.5, the VMware hypervisor cannot work with LUNs that use a logical block size of 4K. When using VMware, be sure to specify Normal (512 LBs) from your XtremIO array.

References: https://gruffdba.wordpress.com/2015/08/02/4k-logical-block-size-size-fails-on-vmware/

Questions 13

A customer has decided to use VMware Horizon View as their desktop virtualization technology. Their VDI environment will consist of XtremIO storage and ESXi hosts. They are looking for increased speed and low latencies while performing file copy operations.

What should the setting for VAAI XCOPY I/O size be set to in order to achieve this requirement?

A. 8 kB

B. 63 kB

C. 256 kB

D. 4 MB

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Correct Answer: C

The VAAI XCOPY I/O size of 256 kB gives the best performance. 4 MB is the default value.

References: https://www.emc.com/collateral/white-papers/h14279-wp-vmware-horizon-xtremio-designconsiderations.pdf, page 57

Exam Code: E20-526
Exam Name: XtremIO Solutions and Design Specialist for Technology Architects
Last Update: Jun 07, 2025
Questions: 67

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